modernization vs modernisation

modernization and modernisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
modernization	Yes	No	No	No
modernisation	Yes	No	No	No

As nouns, modernization and modernisation are synonyms defined as:

modernization and modernisation: making modern in appearance or behavior

modernization (noun)	modernisation (noun)
making modern in appearance or behavior	making modern in appearance or behavior
a modernized version (as of a play)